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REDET(1)			 User Commands			      REDET(1)

       redet - regular expression development and execution tool

       redet <options> [<input file>]

       redet  allows  the  user	to construct regular expressions and test them
       against input data by executing any of a	variety	 of  search  programs,
       editors,	 and  programming  languages  that make	use of regular expres-
       sions. When a suitable regular expression has been constructed  it  may
       be saved	to a file.

       Redet  currently	supports over fifty different programs and regular ex-
       pression	libraries. These include multiple versions  of	grep,  several
       editors	(Ed,  Emacs,  Sed,  Vim),  all the popular scripting languages
       (Awk, Perl, Python, Ruby, Tcl) and some less popular ones  (Lua,	 Pike,
       Rebol), most shells (Bash, Ksh, Tcsh, Zsh) and various other languages,
       including Guile,	Icon and Java.

       For each	program, a palette showing the	available  regular  expression
       syntax  is  provided.  Selections from the palette may be copied	to the
       regular expression window with a	mouse click. Users may add  their  own
       definitions  to	the palette via	their initialization file.  Redet also
       keeps a list of the regular expressions executed,  from	which  entries
       may  be copied back into	the regular expression under construction. The
       history list is saved to	a file and restored on startup,	so it persists
       across sessions.

       Redet  provides	both  regular  expression matching and substitution so
       long as the underlying program does.

       Although	Redet is primarily an interface	for other  programs,  it  adds
       some  features  of  its	own.  It is possible to	define named character
       classes within Redet  and to intersect them.  This  allows  provides  a
       means of	searching on feature matrices.

       So  long	as the underlying program supports Unicode, redet allows UTF-8
       Unicode in both test data and regular expressions. Several  tools  pro-
       vide  additional	 support for Unicode use. These	include	popup lists of
       Unicode ranges and general character properties,	a widget for  entering
       characters  by  their numerical code, and widgets for entering Interna-
       tional Phonetic Alphabet	characters, widgets for	entering letters  with
       a variety of accents and	other diacritics. Although internal operations
       are entirely in Unicode,	test data, comparison data, and	results	may be
       read  and  written in any encoding supported by Tcl/Tk.	Redet is fully
       internationalized. If a suitable	message	catalogue is provided, the in-
       terface	may  be	made available in any language and writing system sup-
       ported by Unicode for which the necessary fonts are available.

       For usage information, execute redet with the command line flag -h.

       Full information	about redet is available from  the  reference  manual,
       which  consists	of  a set of web pages.	The master copy	is located at:   The	 entry
       Illustrated  Web	 Manual	 on  the Help menu will	take you to the	master
       manual page.  The manual	pages are packaged with	every copy of Redet.

       -c <file	name>
	      read character class definitions from the	named file

       -d     set the debug flag.  This	causes additional  information	to  be
	      printed  during  program execution.  It is mostly	useful for de-

       -F <filename>
	      read a feature list from <filename>

       -f     act as a filter. This means that input is	read from the standard
	      input and	output written to the standard output.

       -H     do not read the history file

       -h     print this help information

       -I <file>
	      read <file> as the initialization	file

       -i     do not read the initialization file

       -n     do not execute feature tests on startup

       -P     list the programs	supported and indicate which are available

       -p <program>
	      use the named program

       -s     start up in substitution mode

       -t     show the results of feature tests

       -v     print the	program	name and version, then exit

       awk (1),	ed (1),grep (1), perl (1), sed (1)

       Bill Poser (

       GNU  General Public License (, ver-
       sion 2.

redet				   May 2007			      REDET(1)


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